Each of these Shooting Accessories crafted by Armageddon Gear have different fills. The Nylon Python is filled with a 50/50 mix of their heavy and ultralight fill, and the Waxed Canvas Python is filled with heavy sand, each of these accessories are designed to provide the stability you need to take precise shots down range. This Armageddon Gear Python Adjustable Rifle Shooting Bag features dual one-inch webbing straps that allow you to adjust the bag for hard or soft support, and you can change the shape or size to best match your current situation. Stabilize your shots with the remarkably versatile Armageddon Gear Python Adjustable Shooting Bag. Like everything they make, the Python is proudly Made In the USA!